. The Cambridge natural history. Zoology. 466 ARACHNIDA ACARINA CHAP. Fam. 1. Sarcoptidae.—No tracheae or stigmata. Apical rostrum. Oviparous or ovoviviparous. The seventy genera and 530 odd species of this family are divided into a number of sub-families, of which the principal are the Sarcoptinae, the Analgesinae, and the Tyro- glyphinae. (i.) The Sarcoptinae are the so-called " Itch- ; They are minute animals, with bodies transversely wrinkled and legs terminating in suckers or bristles. The genus Sarco23tes, which includes about fifteen species, hves in tunnels which it bur
. The Cambridge natural history. Zoology. 466 ARACHNIDA ACARINA CHAP. Fam. 1. Sarcoptidae.—No tracheae or stigmata. Apical rostrum. Oviparous or ovoviviparous. The seventy genera and 530 odd species of this family are divided into a number of sub-families, of which the principal are the Sarcoptinae, the Analgesinae, and the Tyro- glyphinae. (i.) The Sarcoptinae are the so-called " Itch- ; They are minute animals, with bodies transversely wrinkled and legs terminating in suckers or bristles. The genus Sarco23tes, which includes about fifteen species, hves in tunnels which it burrows in the skin of mammals. (ii.) The Analgesinae are the " Birds'- feather ; The principal genera are Fterolichus (120 species), Pteronyssus (33 species), Analges (23 species), Megninia (42 species), and Alloiotes (33 species). (iii.) The Tyroglyphinae ^ have received the popular name of " Cheese-mites," from the best known example of the group. They are smooth-bodied, soft-skinned white Mites, with legs usually terminating in a single claw, sometimes accompanied by a sucker. They are for tlie most part carrion-feeders, living upon decaying animal or vegetable matter, but a few are parasitic on mammals, insects,. Fig. 241.—A, Leg of a fowl infested with " leg - scab " ; B, female of Sarmptes ^^^ ^ormS. mutans, greatly magnified. (After Neumann.) There are sixteen genera, including about fifty species. Tyroglyphus siro and T. longior are common Cheese-mites. Other species live in decaying vegetables and food-stuffs. Some of the genus Glycyphagus {G. palmifer, G. jplumiger) are very remarkable for the palmate or plumose hairs which decorate their bodies. The remarkable hypopial stage in the development of Tyroglyphus has been mentioned on. p. 463. The Tyroglyphinae are the lowest of the free-living Acarine forms. 1 See Michael, British Tyroglyphidac, published by the Eay Society, Please note that these images are extracted from s
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